Push the engine side of the intake tube on first. Be sure to firmly press it back into place. You do not want the intake tube coming off while driving down the road.

For the filter-box half of the intake tube, first be sure to place the little tab on the tube inside of the notch as shown in the second photo.

Now tighten up that screw. Get it very tight. As with the other end of the intake tube, you do not want it coming off while driving.